63991159 has 4 divisors (see below), whose sum is σ = 64398904. Its totient is φ = 63583416.

The previous prime is 63991153. The next prime is 63991163. The reversal of 63991159 is 95119936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63991159 - 2⁵ = 63991127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63991153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203637 + ... + 203950.

It is an arithmetic number, because the mean of its divisors is an integer number (16099726).

Almost surely, 2^63991159 is an apocalyptic number.

63991159 is a deficient number, since it is larger than the sum of its proper divisors (407745).

63991159 is a wasteful number, since it uses less digits than its factorization.

63991159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407744.

The product of its digits is 65610, while the sum is 43.

The square root of 63991159 is about 7999.4474184158. The cubic root of 63991159 is about 399.9815804018.

The spelling of 63991159 in words is "sixty-three million, nine hundred ninety-one thousand, one hundred fifty-nine".